member of the ancient Persian priestly caste, late 14c., singular of magi (q.v.).

magi

n.

c.1200, "skilled magicians, astrologers," from Latin magi, plural of magus "magician, learned magician," from Greek magos, a word used for the Persian learned and priestly class as portrayed in the Bible (said by ancient historians to have been originally the name of a Median tribe), from Old Persian magush "magician" (see magic). Related: Magian.